Improved lathe for finishing the driving-wheels of locomotives



Wire.

HENRY D. STOVER, OFfNEW YORK, N. Y.

Letters Patent No. 91,788, dated June 22, 1869.

IMPROVED-LATHE FOR FINSHIN G- THE DRIVING-WHEELS OF LOCOMOTIVES.

The Schedule referred to in these Letters Patent and making part of thesame.

Know all men by these presents:

VThat LHENRY- D. STOVER, ofthe city, county, and State of Nmv-York, haveinvented a new and useful .Improvement in Lathes' for Finishing andRepairing the Dxiving\Vlxeels of Locomotives, and for other similardevices, whereby much time and labor are saved'in boring, splining, or'cutting the keyseat, and facing the hubs and tread of the wheels, boringfor the crank-pins, &c., greater accuracy being secured in accomplishingthe work, besides saving the expense of the most skilful operatives.

My invention relates ohieiiy to the combination of certain devices withthe ordinary driving-wheel lathe, by which, while the wheel is beingbored to receive the shaft, the inner end of the hub may bc faced ortrued up, by a tool fbr that purpose; and as soon as the two operationsare completed, another device is introduced, which splines or forms thekey-seat before the wheel is shifted from the face-plate.

Again, while the wheels are mounted upon the axle and centred in thelathe, the outer face of onemay be finished, while the tread or tire ofthe other is being turned oil'.

And lastly, by means of a boring-apparatus, in combination with such alathe, Iam enabled to bore Vthe holes for the crank-pins accurately intheir places, either to the right or left, and from the outside of thewheel, thereby `overcoming the diiiculty heretofore experienced, whenboring from the inside, of making the holevslightly tapering in thewrong direction, in consequence of the wear of the tool; but by bor-Ving from the outside, the hole, if tapering, has the taper in the rightdirection for driving-iu the crankpm.

That others may understand the nature of my invention, I will nowproceed to explain the devices more fully; and .I do hereby declare thatthe following is a true and exact description of the same, referencebeing had to the accompanying drawings, making a' part of thisspecification, and to the letters of reference marked thereon, so thatthose' skilled in the art may make and use my invention.

Like lettersv represent like part-s in the several iigures.

In the drawings- Figure l represents a front Velevation of my lathe;

Figui-e2, the inner face ofthe head face-plate, showing the device forquarter-ing or locating the crankpins, 85o.; whilst Figure 3 representsthe inner face of the tail-plate, with devices for boring the holes forthe crank-pins, &c.

A is the bed or foundation-frame of the lathe.

B, the head or support for holding the drivinggear, mandrel C, andface-plate D.V

E is the support for the tail-stock or centre F and face-plate G, andshows my improvements for snpporting the boring-,apparatus H, L, M, 85o.

N is a temporary tool-rest, for supporting the tools for` facingvIotl'the inner end of the hub, having. a bracket, K, at right angles to it,to hold a tool, and it also` supports a sleeve, Y, inside of which isthe boring-mandrel X, and this sleeve also holds the tool for cuttingthe key-seat.

. O is a temporary l'est, for holding a tool to face oli' the outer endof the hub of one ot' the wheels, whenV they are mounted upon theiraxle, supporting the tool in the stock S between the face-plate G andthe outer face of the wheel to be turned. This tool, with its stock, canbe transferred to the bracket K, to face the inner end. of a hub therebefore the wheel is put on an axle; or after it performs such laborfirst, it is more properly transferred to 0, to iinish the outside of a.hub, as will be more fully detailed hereafter.

P P are transverse guides, resting upon the bed A, which serve tosupport the rests for the tool-stocks.

The frame A, h'ead and tail-stocks B and E, withtheirnlandrels andface-plates C and D, F and Gg, are all constructed in the usual style ofsuch lathes, and I use the ordinary rest and tool-stock, with automaticfeed-motion, for turning oi the tires of the wheels.

H represents the boring-mandrel, mounted in slidingr boxes L and M, andcapable of being moved to and from the lathe-centres by screws, or otherconvenient mechanism.

The operation of my machine may be described in successive detail, asfollows: Y

A wheel is first properly secured, inthe usual manner, to the face-plateD, the outer end of the hub being against or near the plate. Motion iscommunicated through the mandrel C. 4A, boring tool is held firmly inthe mandrel X, which slides in the sleeve Y at the upper part of therest N, and this tool ismoved up to itswork, or back from it, by means.of a screw, n, through any suitable hand-clutch, attached at 'n'. Whilstthis boring is being done, the facing of theiln- Yner end of the hub isalso going on by means of a.

tool, secured in a stock like S, but supported upon the bracket K.

The next operation being to out the key-seat, the face-plate D is heldfast securely by means of a screwstop, t, or equivalent device, passingthrough a bracket or projection, l, on head-rest B. A slotting-tool isthen introduced into X, where the boring-tool was, and this is pushedforward by means of the screw n, driven by a belt on the pulley Z, saidbelt passing over a counter-shaft above, which is provided with suitabledirect and reverse motion. The mandrel X is thus converted into aslotting-tool. I

Itis thus shown, by the arrangementjust described,

how a wheel may be bored, the innerend of hub faced, and the key-seatformed, without changing the position of the wheel attached to theface-plate, all, as it were, at one operation, which may be called thefirst.

The work ou two drivers being thus far done, they are mounted upon theiraxle, and it is centred in the lathe between C and F, the rest N, withits attachments, being removed. Through C, motion is given to the axle,and its Wheels secured to the same. Whilst an ordinary tool-stock is putin position, and properly operated, to turn o' the tire of the wheelnear the face-plate D, the tool in stock S, on rest O, between the otherwheel and facefplate, is applied to face the outer end ofthe hub of thewheel nearest G, or that part of the hub next to it. During thisoperation,

the rest O is securely fastened to the tail-plate G, and G is' preventedfrom turning, by being held .firmly like D was, wheuvthe wheel on it wasbeing slotted for the key-seat, that is, by means of a bolt or screw,t', passing through a bracket, Z', a part of tail-stock E.

The next operation is that of boring out the holes for the crank-pinsanimportant feature of my invention. rlhe wheel to be bored is firstturned until the point through which the pin is to be fixed,comeslopposite t0, or in a vertical line with the mandrel H, and whereit is held securely. lhe mandrel H passes through a sleeve, g, havingthree slotted arms as guides, for raising or lowering it, and it isattached to the face-plate G by screws, as seen in Iig. l. The mandrelin the sliding boxes L M is raised or lowered to its proper position bymeans of a hand-wheel and suitable gearingas seen in g. 1.

Motion is now comin u'nicatedto theboring-tool held in H, byanykconvenien't mechanism, which I have mounted upon the'same slidingboxes, as seen; and this tool is 'ed forward by a screw, or any of thewellknowu devices for operating such tools. lt is retracted by a reversemotion of the same device. x

In this manner the hole for the crank-pins'is bored from the outside,and any wearing away of the tool will only serve to make a taperinghole, which will bind the pin, the more it is driven.

The next operation is to reverse the axle and -wheels between thecentres, and bring the hole alre'ady bored for the crank-pin in onewheel to the stud or sliding bolt i, which projects from a plate, It,bolted to face# plate D, this plate being so formed as to hold the stud,

permitting it to be slid to or from the centre. This stud is so adjustedas to be in an axial line, ninety degrees from the ventical axial one,or that in which the mandrel H and its boring-tool was. lhe studi beinginserted in the crank-pin hole j ust bored, serves as a gauge, and willhold the wheels while the other hole is being bored in the oppositewheel, as has just been explained; but before doing this, the Aperipheryor tire of 'the wheel nearest D may be turned, whilst the outer end of'the hub nearest G is being faced.

It will thus be seen that whilst a single wheel is secured to face-plateD, its hub is bored, one end faced, and the key-seat cut before beingremoved. Two wheels being then secured on an axle, and it centred in thelathe, theouter end of one hub is being faced, whilst the tire of theother is being faced. Next, one of these wheels, whilst still heldbetween the centres, is bored for the crank-pins. The wheels are thenreversed between the centres, the boring and the facing ot' the outerend of the other hub, and the turning of the tire of the other wheelcompleted. Thus, many operations are performedv at the expense of veryfew changes. n

v Having thus described my invention,

What I claim, and desire to secure by Letters Patent, is-

l. The combination of' the boring-mandrel H ,with the double face-platelathe, as described, in the inauner substantially as shown.

2. The combination of the tool-rests K and 0 with the double face-platelathe, substantially in the man-V ner described.

3. In Acombination with such lathes, the tcol-rest N, mandrel X, andIscrew n., substantially as described, and for the purposes set forth.

4. The arrangement of the tool-rest O, between the face-plate G and thewheel to he operated on, in the manner andfor the purpose substantiallyas described.

5. In combination with the double face-plate lathe, the brackets l Vaudstuds or stops t t', vsubstantially as described. y

6. In combination with the double face-plate lathe, the rests K and Nand the slotting and boring-device thereon, substantially as'described.

7. The adjustable stud'or bolt ijand the adjustable lbracket R, whencombined with the double face-plate lathe, substantially as described,and for the purposes set forth. l'

8. The adjustable sleeve g and the boring-tool H, in combination withthe tail face-plate of the lathe, nbjtantially as described, and for thepurposes set lort H. D. STOVER.

\Vitnesses:

J'. BOYD ELIOTT, GEORGE H. RHODES.

